/**
* Copyright (C) 2013-2024 Nanjing Pengyun Network Technology Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/ 

package py.message.impl;

import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import py.message.IfaceMessageHandler;
import py.message.InterfaceMessage;
import py.message.InterfaceReceiver;
import py.message.InterfaceSender;
import py.message.exceptions.MessageHandlerMissingException;
import py.message.exceptions.MessageMapMissingException;

public class Sender implements InterfaceSender {
  private static final Logger logger = LoggerFactory.getLogger(Sender.class);
  protected MessageDispatcher dispatcher = MessageDispatcher.getInstance();

  public Sender() {
    dispatcher.start();
  }

  @Override
  public void sendMessage(InterfaceMessage<?> message, InterfaceReceiver receiver)
      throws MessageMapMissingException, MessageHandlerMissingException, Exception {
    Map<Class<?>, IfaceMessageHandler> destObjMessageMap = receiver.getMessageMap();
    if (destObjMessageMap == null) {
      throw new MessageMapMissingException();
    }

    IfaceMessageHandler handler = destObjMessageMap.get(message.getClass());
    if (handler == null) {
      throw new MessageHandlerMissingException();
    } else {
      try {
        handler.execute(message);
      } catch (Exception e) {
        logger.error("Caught an exception when deal with message: {}", message, e);
        throw e;
      }
    }
  }

  @Override
  public void postMessage(InterfaceMessage<?> message, InterfaceReceiver receiver) {
    logger.debug("Message name: {}", message.getClass());
    this.dispatcher.add(message, receiver);
  }

  @Override
  public void postMessage(InterfaceMessage<?> message) {
    logger.debug("Going to broadcast message: {}", message);
    this.dispatcher.add(message);
  }

  @Override
  public String toString() {
    return "Sender [dispatcher=" + dispatcher + "]";
  }

}
